Low or No Oil Pressure

The following conditions may cause low or no oil pressure:

• Low oil level. Fill to the full mark on the oil level indicator.
• Incorrect or malfunctioning oil pressure switch. Replace the oil pressure switch.
• Incorrect or malfunctioning oil pressure gauge. Replace the oil pressure gauge.
• Improper oil viscosity or diluted oil
  • Install oil of proper viscosity for expected temperature.
  • Install new oil if the oil is diluted.
• A worn or dirty oil pump. Clean or replace the oil pump.
• A plugged oil filter. Replace the oil filter.
• A loose or plugged oil pickup screen. Replace the oil pickup screen.
• A hole in the oil pickup tube. Replace the oil pickup tube.
• Excessive bearing clearance. Replace the bearings.
• Cracked, porous, or plugged oil gallery. Repair or replace the engine block.
• Missing or improperly installed gallery plugs. Install or repair the plugs as needed.
• A stuck pressure regulator valve
  • Inspect the pressure regulator valve for sticking in the bore.
  • Inspect the bore for scoring and burrs.
• A worn or poorly machined camshaft Replace the camshaft.
• Worn valve guides Repair the valve guides as needed.